Deuteronomy 4:42; Deuteronomy 19:4

Deuteronomy 4:42

42 that a manslayer might flee there, who unintentionally slew his neighbor without having enmity toward him in time past; and by fleeing to one of these cities he might live:

Deuteronomy 19:4

4 "Now this is the case of the manslayer who may flee there and live: when he kills his friend unintentionally , not hating him previously -